Induced and Constitutive Isoflavonoids in Phaseolus mungo L. Leguminosae

Abstract

Abstract Sixteen isoflavonoids have been isolated from the black gram. Phaseolus mungo L. (syn. Vigna mungo) following treatment with aqueous CuCl2. These include 12 known isoflavonoids: genistein. 2′-hydroxygenistein. 2′-hydroxydaidzein, kievitone, dalbergioidin, cyclokievitone. 5-deoxykievitone, 2′-hydroxydihydrodaidzein, isoferreirin, aureol, glycinol and demethylvestitol. In addition, kievitone hydrate, which was previously known only as a fungal metabolite of kievitone, was isolated together with 3 novel natural isoflavanones which were characterized as 4′-O-methylkievitone, cyclokievitone hydrate and 5-deoxykievitone hydrate.